Bicycle handlebar



FIG. 1 is a top plan view of the bicycle handlebar showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevation view thereof; and

FIG. 5 is a front elevation view thereof. 

The ornamental design for a bicycle handlebar, as shown. 